body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.game-container {
  text-align: center;
  background-color: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  max-width: 500px;
  width: 100%;
}

h1 {
  color: #333;
  margin-bottom: 20px;
}

.game-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 10px;
  background-color: #eee;
  border-radius: 5px;
}
/* Base styles remain the same as before */

/* Add these new styles */
.customization-panel {
  background-color: #f0f0f0;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
}

.customization-option {
  display: flex;
  flex-direction: column;
  min-width: 150px;
}

.customization-option label {
  margin-bottom: 5px;
  font-weight: bold;
}

.customization-option select {
  padding: 8px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

/* Card Styles */
.card.rounded .card-front,
.card.rounded .card-back {
  border-radius: 10px;
}

.card.square .card-front,
.card.square .card-back {
  border-radius: 0;
}

.card.circle .card-front,
.card.circle .card-back {
  border-radius: 50%;
}

/* Animation Speeds */
.card.slow .card-inner {
  transition: transform 1s;
}

.card.normal .card-inner {
  transition: transform 0.5s;
}

.card.fast .card-inner {
  transition: transform 0.2s;
}

/* Themes */
.theme-animals .card-back {
  background-color: #ffcc99;
}

.theme-fruits .card-back {
  background-color: #ccff99;
}

.theme-vehicles .card-back {
  background-color: #99ccff;
}

.theme-emoji .card-back {
  background-color: #ffccff;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .customization-panel {
    flex-direction: column;
    gap: 10px;
  }
  
  .customization-option {
    width: 100%;
  }
}

button {
  background-color: #4CAF50;
  color: white;
  border: none;
  padding: 8px 16px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 14px;
  margin: 4px 2px;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #45a049;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  justify-content: center;
  margin: 0 auto;
}

.card {
  width: 100px;
  height: 100px;
  perspective: 600px;
  cursor: pointer;
  position: relative;
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s;
}

.card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front,
.card-back {
  width: 100%;
  height: 100%;
  position: absolute;
  backface-visibility: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.card-front {
  background: #2c3e50;
  color: white;
}

.card-back {
  background: #f8f8f8;
  transform: rotateY(180deg);
  color: #2c3e50;
}

.win-message {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  z-index: 100;
}

.win-message h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.win-message p {
  font-size: 1.5rem;
  margin-bottom: 30px;
}

.hidden {
  display: none;
}

@media (max-width: 600px) {
  .game-board {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .card {
    width: 80px;
    height: 80px;
  }
}